1. Electroplating: A part to be electroplated is immersed in an aqueous solution containing a metal compound to be deposited, and an electric current is passed through the bath to deposit and deposit the plated metal on the part. Generally electroplated with galvanized, copper, nickel, chromium, copper-nickel alloys, etc., sometimes boiled (blue), phosphatized, etc. are also included.
2. Hot-dip galvanizing: This is accomplished by immersing the carbon steel parts in a bath of dissolved zinc at a temperature of approximately 510°C. As a result, the iron-zinc alloy on the surface of the steel gradually becomes passivated zinc on the outer surface of the product. Hot dip aluminum plating is a similar process.
3. Mechanical plating: The surface of the product is impacted by the particles of the plated metal, and the coating is cold-welded to the surface of the product.
General screws are mostly electroplated, but they are used for hot-dip galvanizing in hexagonal wood screws such as electricity, highways, etc.; the cost of electroplating is generally 0.6-0.8 yuan per kilogram, and hot-dip zinc is generally 1.5-2 yuan/ Kilograms, the cost is higher.
Water loop heat pump
Cooling capacity 2.5kW-45kW
Advantage: Packaged type water loop heat pump to save space; High efficiency; Installation very easily and low noise. Split type water loop heat pump(optional).
Characteristics:
1.Structure. Galvanised steel construction, closed cell foam lined compressor and fan compartments, with an insulated and powder coated drain tray for complete moisture protection, the drain tray is easily removed for inspection and cleaning.
2.Refrigerant. Each heat pump Air Conditioner is factory charge with refrigerant R410a, which is deemed to have zero ozone depletion potential.
3.Hermetic compressor. Single phase rotary compressor is used for this heat pump unit, with built-in thermal overload cut-out, mounted on rubber vibration dampers.
4.Centrifugal fan. High efficiency, double inlet centrifugal fan. Protection level IP44. Low noise, low speed, big air flow and high ESP.
5.Water side heat exchanger. High efficiency coaxial heat exchanger, factory insulated with flexible close cell material.
6.Air filter. An optional filter integrated return air spigot is available on all models. The filter is a washable polypropylene net media. Care should be taken, when location each unit, that to enough space is provided to enable the one-piece filter to be withdrawn to its full length from either side of the heat pump air conditioner.
7.Electric heater(optional). For cooling only version. Electric elements have spirally wound stainless steel fins to give increased area and low surface temperature. They are totally enclosed within the water cooled packaged chiller and are supplied with safety cutouts. An optional fan run-on timer for rapid heat dissipation is available.
8.Electric panel. Consists of:
Compressor contactor
Compressor protection breaker
Microprocessor with function display
9.All models are equipped with wire controller with the following features:
♦ 7days programmable timer
♦ Auto random reset
♦ Error self diagnostic
10.Safety protection. High pressure switch, low pressure switch, discharge temperature protection and anti freezing protection.
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Jinan Amrta Air Conditioning Co.,Ltd , https://www.amrtaac.com